osteman



- Mel) 0. G. OSTEMAN'.

BEVEL.

Patented July 25, 1893.

NITED STATES ATENT OFFICE.

CARL G. OSTEMAN, OF BOSTON, MASSACHUSETTS, ASSIGNOR OF ONE-HALF TO THES. A. WVOODS MACHINE COMPANY, OF SAME PLACE.

BEVEL.

SPECIFICATION forming part of Letters Patent No. 502,199, dated July 25,1893.

Application filed March 6, 1893. Serial No. 464,854. (No model.)

' To all whom it may concern:

Be it known that I, CARL G. OSTEMAN, of Boston, county of Suffolk, Stateof Massachusetts, have invented an Improvement in Universal Bevels, ofwhich .the following description, in connection with the accompanyingdrawings, is a specification, like letters and figures on the drawingsrepresenting like parts.

This invention relates to universal bevels.

The so-called universal bevels as at present constructed consist ofahead and a tongue, both slotted longitudinally and connected by meansof an adjustable thumb screw. The range of adj ustability of thesebevels is limited and by reason of one member lying across or on top ofthe other the bevel cannot be laid fiat upon a sheet of drawing paper orupon a working surface, one of the members always being raised somewhatfrom the surface.

The object of this invention is to provide a universal bevel ofpractically unlimited range of adjustment, and one in which both membersshall lie flat upon the working surface.

Figure 1, represents one form of bevel embodying this invention. Fig. 2,shows the parts in a different position. Fig. 3, a cross section takenon the dotted line 00% Fig. 2; and Figs. 4 and 5, rear side views of thebevel showing the parts in different positions.

Referring to the drawings, the bevel consists primarily of twoindependent members a, I), provided respectively with longitudinal slotsat, b, to receive the shanks of the thumb screw bolts 0, the members a,b, at their rear sides being rabbeted or countersunk to receive theheads 0' of the said bolts below the surfaces of the members, as shownbest in Figs. 3, 4 and 5.

The bolts 0 project upwardly from the members a, I), through a slot atin a preferably curved link (1, see Fig. 1, and receive upon their endsthe thumb nuts d by means of which the two members of the bevel and thelink may be clamped in any desired adjusted positions.

It will be seen by reference to Fig. 3, that the under surfaces of thetwo members, 2'. e., the surfaces which rest upon the working surfaceare perfectly smooth, the bolt heads being sunk below or flush with thesurfaces and also that the two surfaces lie in the same plane so thatboth may lie flat upon a surface when required.

1 preferably provide the members with angular ends, as shown, the anglesbeing varied to meet the requirements of the particular class of workfor which the bevel is designed. For instance, in the particular bevelshown, the member a, has one of its ends cut at an angle of thirtydegrees, such angle being stamped upon the member, as shown, while itsopposite end is cut at an angle of sixty degrees, which angle is alsostamped upon the member. The member I) has one of its ends cut at anangle of ninety degrees and its opposite end at an angle of forty-fivedegrees both being indicated, as shown.

To illustrate the universality of theinstrument, reference may be hadfirst to Fig. 1, wherein the two members are shown as employed inmeasuring the angle of the head of a screw,'the curved link d permittingthe entire head to be viewed at the same time that it is being measured.

In Fig. 2, the two members are shown as arranged parallel and in contactwith each other, the angular ends 45 and 30 at that time forming thecorrect angle for an eight sided or octagonal nut, while the oppositeends and 90 form the correct angle for a hexagonal nut. In Fig. 4, thetwo members are shown as adjusted in position to measure an angle of adovetail groove or projection, while in Fig. 5, the same members areshown as adjusted for measuring a dovetail of a different angle, theangle in the latter instance being fixed by bringing the member a, flushagainst the angular end 45 of the member I).

In Fig. 5, by swinging the member a, up and over to the left and down incontact with the squared ninety degree end of the member I), as shown indotted lines, a perfect square is produced and the pointed end 30 of themember a, may well be used in connection with the straight under edge ofthe member I) to measure the depth of a V-shaped slot or any otherdepression or opening.

It will be seen that the two members may be turned about each other inany direction, and by means of the adj ustability of the link in theslots of the members, said members may be moved into any desiredpositions with re lation to each other, the fixed angles to which theends of the members are cut and marked materially assisting in theadjustment of the members for the usual angles found in ordinary machinework.

The invention is not restricted to the particular shape or constructionof the various parts for the same obviously may be varied withoutdeparting from the spirit and scope of the invention.

If desired, either or both of the members may he graduated to a scale,and also the curved link (Z, the instrument in the latter instance thenserving as a protractor.

I claim- 1. A universal bevel consisting of two independent members, incombination with a link connecting the said members at one of theirfaces to thereby permit the opposite faces of said members to be laidflat upon the same workin g surface throughout their lengths, andclamping devices to clamp said members in relative adjusted positions,substantially as described.

2. Auniversal bevel consisting of two independent members, incombination with a curved link connecting the same, and clamping devicesto retain said members and link in adjusted positions with relation toeach other, substantially as described.

3. A universal bevel consisting of two independent members havinglongitudinal slots,

in combination with a slotted link, and adjusting devices connectingsaid members and link and made adjustable in the slots of the same,substantially as described.

4:. A universal bevel consisting of two independent members havingslots,in combination with a slotted link, and thumb bolts passed throughthe slot in said link and through the slots in said members respectivelyand having their heads flush with the under surfaces of said members,whereby said members and link may be clamped in adjusted position withrelation to each other, substantially as described.

5. A universal bevel consisting of two inde pendent members havinglongitudinal slots and angular ends, in combination with a linkconnecting said members with their under faces in the same plane, andadjusting devices to clamp said members and link in adj usted positionswith relation to each other, whereby one of the said members may bemoved about and against the angular end of the other to thereby fix theangle between the two members as of the angle of said angular end,substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

CARL G. OSTEMAN.

YVitnesses:

FREDERICK L. EMERY, EMMA J. BENNETT.

